Combination fixture-insulator.



C. H. GAFFNEY.

COMBINATION FIXTURE INSULATOR.

APPLICATION FILED OCT. 8, 1915.

Patented Feb. 8, 1916.

INLZENTDE 6M MJW 764 9% M A? T RN: 3

CHARLES HENRY GAFFNEY, OF MEDFORD, MASSACHUSETTS.

COMBINATION FIXTURE-INSULATOR.

Application filed October 8, 1915. Serial No. 54,896.

0 all whom it may concern Be it known that 1, CHARLES HENRY Garr- NEY, a citizen of the United States, residing at Medford, in the county of Middlesex and of splicing boxes and five different sizes of canopies, and having details of construction, as will be more fully set forth hereinafter, and claimed.

Figure 1 is a side View 'of an electric light fixture provided with my improved combination insulator and showing part of a wall in section. Fig. 2 is an enlarged longitudinal' sectional view through the splicing box, light fixture and insulator, showing the construction of the insulator and the direct wiring through the same, and Fig. 3 is a back view of the complete combination insulator for electric light fixtures.

In the drawings 5 indicates a portion of a wall in section, 6 a splicing box, 7 an electric light fixture having the usual light bulb 8, globe 9, switch 10, bracket 11 and canopy 12 and 13 my improved combination fixture insulator. The splicing box 6 is of the usual closed construction having a cover 14: with an outwardly extending circular lip 15 forming an opening 16 in the cover which may form a part of the box or which may be secured to the box inany well known way. This splicing box 6 is embedded in the wall with the insulator 13 flush withthe surface of the wall, as shown in Fig. 1. The bracket 11 through which the wires 17. 17 extend is in the usual pipe form with the externally screw-threaded inner end 18, and the usual canopy 12 on the bracket 11 is incontact with and forms a cover for the insulator 13, as shown in Fig. 2.

My improved combination fixture insulator 13 is constructed preferably of compressed fiber in the form of a fiat ring 19 having a cross-bar 20 extending centrally Specification of Letters Patent.

Patented Feb. .8, 1916.

from one side of the ring to the other side, and forming openings 20. 20*, at each side of the cross-bar for access to the splicing box. This cross-bar 20 has a central screwthreaded hole 21, in which is screwed an ex ternally and internally screw-threaded metal fitting 22, the external screw-threaded portion of which extends through and beyond the bar 20, in a position for an internally screw-threaded fitting 23 to screw over the same and against the bar 20 thereby rigidly clamping the fittings 22'and 23 to the bar of the insulator 13. The fitting 22 has the internally screw-threaded portion 24 into which the screw-threaded end 18 of the bracket 11 is screwed thereby firmly and rigidly securing the bracket to the insulator. In addition to the center screw-threaded hole 21 there is formed in the cross-bar 20 on each side of the center, a series of three screw holes 25. 25.25., as shown in Figs. 2

and 3. For the size splicing box shown, a screw 26 isinserted through each of the holes 25, 25 adjacent the center, each screw 26 being screw-threaded through the end 27 of a bent clamping member 28 having an end 29 which extends under and against the inner face of the cover 14. By tightening the screws 26. 26 the insulator 13 is rigidly secured to the box 6, as shown in Fig. 2. The insulator may be secured to larger boxes by inserting the screws 26. 26 through the intermediate or outer holes 25. 25, and then through the clamping members 28. 28.

By my improved construction the openings in the fixture insulator allow easy access to the interior of the splicing box when required, and one insulator will accommodate three different size splicing boxes and five different size canopies, at a material reduction in cost and saving of labor in installation, as there is only one member to handle.

It is evident that the construction of my improved combination fixture could be materially modified within the scope of the appended claims.

Having thus described my invention I claim as new- 1. A fixture insulator constructed of compressed fiber in the form of a fiat ring having a central cross-bar, and comparatively large openings at each side of the cross bar, said cross-bar having a central screw-threaded hole and a series of screw holes at each side of the central hole, an externally and insulator v box embedded in a wall, a fixture insulator internally screw-threaded fitting extending through the center screw-threaded hole, an internally screw-threaded fitting screwed on to the first mentioned fitting, whereby the insulator is clamped between the two fittings, a screw through two of the screw holes, each screw screwing into one end of a clamp, said screws and clamps being adapted to fasten the insulator to a splicing box, all for the purpose as described.

2. In an electric light fixture, a splicing box embedded in a wall, a fixture insulator on the splicing box flush with the surface of the wall and constructedof compressed fiber in the form of afiat ring having a fiat central cross-bar and a comparatively large semi-- circular opening at each side of the cross bar, said crossbar having a central screwthreaded hole and a series of screw holes at each side of the central hole, an externally andinternally screw-threaded fitting screwed through the central screw-threaded hole, an internally screw-threaded fitting screwed on to the first mentioned fitting, thereby clamping the insulator between the two fittings, screws through two of the screw holes, each screw screwing into one end of a clamp, said screws and clamps fastening the insulator to the splicing box, as described.

3. In an electric light fixture, a splicing on the splicing box flush with the surface of the Wall and constructed of compressed fiber in the form of a flat ring having aflat central cross-bar and a comparatively large semi-circular opening at each side of the cross-bar, said cross-bar having a central screw-threaded hole, an externally and internally screw-threaded fitting screwed through the central screw-threaded hole, an internally screw-threaded fitting screwed on to the first mentioned fitting, thereby clamping the insulator between the two fittings, an electric light tube having a screw-threaded end screwed into the first mentioned fitting and means for fastening the fixture insulator to the splicing box, as described.

4:- In an electric fixture, a fixture insulator of compressed fiber and having a central screw-threaded hole, and comparatively large side openings, an externally and internally screw-threaded fitting screwed through the central screw-threaded hole, and against the face of the fixture insulator, an externally screw-threaded fitting screwed on to the first mentioned fitting and against the back of the fixture insulator, thereby clamping the insulator between the two fittings, a light bracket having an externally screwthreaded inner end, and rneans for rigidly and securely" fastening the light bracket to the fixture insulator, consisting of screwing the inner-end of the light bracket into the first mentioned fitting in the fixture insulator, as described.

In testimony whereof, I have signed my .name to this specification.

CHARLES HENRY GAFFNEY. 

